A belt comprising an embedded two-component cord and method for molded power transmission belts

A belt having a tensile cord (12) embedded in the belt, extending in a longitudinal direction and made up of two components: a tensile component (31) and a sacrificed component (32'). The sacrificed component may be broken into a plurality of discontinuous segments (32'). The tensile component provides most of the reinforcement of the belt. The sacrificial component of the precursor cord protects the tensile component from excessive stretching during cord treating and winding, but breaks, melts, or yields during mandrel expansion during the belt molding process, thus preserving the stretchability of the tensile component. 种具有嵌入在带中的拉伸线绳(12)的带，所述拉伸线绳沿纵向方向延伸并且由两个部件构成：拉伸部件(31)和牺牲部件(32')。牺牲部件可以断裂成多个不连续区段(32')。拉伸部件提供了大部分的带增强。前体线绳的牺牲部件在线绳加工和卷绕期间保护拉伸部件免于过度伸展，但在带模制加工期间的芯轴扩张过程中断裂、熔融或屈服，从而保留拉伸部件的伸展性。